Nuclear Radiation Information

Reading of environmental radioactivity level by prefecture, Time series data（Graph) (English version: http://www.mext.go.jp/english/radioactivity_level/detail/1303986.htm

Source: Gakuranman 12.43: “Here’s a chart showing the range of radiation levels in milli sieverts (mSv). Currently up to 400mSv per hour are being recorded in the immediate vicinity of Fukushima. Remember, although these figures may suggest that the level of radiation being recorded at Fukushima is not extremely high, the danger is constant exposure over a period of time. For this reason, people within the 20km evacuation zone are at high risk of serious harm.”